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A kind of preparation method of battery composite electrode material

A composite electrode and battery technology, used in battery electrodes, electrode manufacturing, secondary batteries, etc., can solve the problems of short life cycle, unstable structure, poor rate performance, etc., and achieve increased conductivity, simple preparation method, and increased activity. effect of location

Active Publication Date: 2021-09-28
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the existing problems such as unstable structure, large particle size, low conductivity, short life cycle, poor specific capacity and poor rate performance of existing tin phosphide electrode materials, the first purpose of the present invention is to provide a battery composite A preparation method for an electrode material, the preparation method comprising the following steps: mixing simple phosphorus, tin and graphite in an inert gas atmosphere and ball milling to obtain

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  • A kind of preparation method of battery composite electrode material
  • A kind of preparation method of battery composite electrode material
  • A kind of preparation method of battery composite electrode material

Examples

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Embodiment 1

[0037] This embodiment provides a battery composite electrode material, and the preparation method includes the following steps:

[0038] 0.03 mol of red phosphorus, 0.04 mol of tin and 2.43 g of graphite were weighed and assembled with a ball-to-material ratio of 70:1 and sealed in a stainless steel ball mill jar under an argon atmosphere. (The ball milling medium is a stainless steel ball with a diameter of 0.5 cm) After 30 hours, the P-Sn@G73 electrode material was obtained.

Embodiment 2

[0040] This embodiment provides a battery composite electrode material, and the preparation method includes the following steps:

[0041] 0.03 mol of red phosphorus, 0.04 mol of tin, and 5.69 g of graphite were weighed and assembled with a ball-to-material ratio of 80:1 and sealed in a stainless steel ball mill jar under an argon atmosphere. The balls (stainless steel balls with a diameter of 0.5 cm as the ball milling medium) were taken out after 30 hours to obtain the P-Sn@G55 electrode material.

Embodiment 3

[0043] This embodiment provides a battery composite electrode material, and the preparation method includes the following steps:

[0044] 0.03 mol of red phosphorus, 0.04 mol of tin, and 1.42 g of graphite were weighed and assembled at a ball-to-material ratio of 80:1 and sealed in a stainless steel ball mill jar under an argon atmosphere. The balls (stainless steel balls with a diameter of 0.5 cm in the ball milling medium) were taken out after 30 hours to obtain the P-Sn@G82 electrode material.

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Abstract

The invention provides a preparation method of a battery composite electrode material. The preparation method of the battery composite electrode material includes the following steps: mixing phosphorus element, tin element and graphite by ball milling in an inert gas atmosphere. Among them, the ball mill is a high-energy ball mill, and the rotation speed is preferably 100r / min~900r / min. The method provided by the present invention can make the three evenly dispersed by ball milling, and the obtained composite electrode material can be used for lithium ion battery and sodium ion battery electrode material. Compared with the traditional composite synthesis method of phosphide or red phosphorus, the method is more convenient, the surface of the prepared material has certain pores, and it has but dispersibility, and has the advantages of convenience, environmental protection and cleanliness in the production process of the material. The composite electrode material obtained by the invention exhibits excellent specific capacity, charge-discharge cycle stability and rate performance as electrode materials for lithium ion batteries and sodium ion batteries.

Description

technical field [0001] The invention relates to the field of composite materials, and more specifically, to a method for preparing a battery composite electrode material. Background technique [0002] Regardless of the utilization of renewable energy such as new energy vehicles or solar wind energy, rechargeable batteries with excellent performance are extremely important. For new energy vehicles, batteries with large capacity and high output power can bring sufficient power and battery life for new energy vehicles; while for the utilization of renewable energy such as solar and wind energy, large-scale electric energy storage devices with excellent performance are required to These energies are stored in order to smoothly supply these electric energies to the grid, otherwise they cannot be fully utilized. Alkali metal ions (Li + / Na + ) battery has become one of the emerging candidate systems for grid energy storage due to its inherent safety, and researchers have made s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/0525H01M10/054
CPCH01M4/38H01M4/387H01M4/625H01M10/0525H01M10/054H01M4/04B82Y30/00B82Y40/00Y02E70/30
Inventor 孙黎张元星张以河
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)